2 Extractor fans need wiring up. One in the Bathroom can be connected to the lighting circuit, But the one in the kitchen will need to be connected to a new switch. Both units have been put in to the ceiling and ducted to the outside so only wiring needs to be run and connected. There is a water cylinder cupboard the wiring can be run on the in side of for the kitchen unit, to make it easier than trying to run wires down the inside of the wall if you prefer to do it that way. Time frame ASAP as we are waiting for insulation install as well and it would be easier to do this job before that is installed.